Sonosite PX was used in a study to measure muscle cross-sectional area in preterm and term infants. Lean body mass is linked to improved outcomes, but infant muscle-specific tools are limited. Bedside ultrasound measurements of muscle cross-sectional area (CSA) may overcome these limitations.
This prospective observational cohort study was approved by the Seattle Children’s Hospital and University of Washington Institutional Review Boards. Informed consent was obtained from the infant’s parent prior to participation in the study. The primary outcome of this study was the biceps muscle cross-sectional area at each given postmenstrual age (PMA). Secondary outcomes were rectus femoris muscle cross-sectional area at each given PMA, as well as muscle CSA relationships to anthropometric measurements and nutritional intake.
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